Linksys BUSINESS SPA922 - Manual (Page 114)

Linksys SPA9x2 Phone Administration Guide 107
Dial Plan Parameters
Customizing SPA9x2 Extensions
Emergency Number Enter a comma-separated list of emergency numbers. When one of
these numbers is dialed, the unit disables processing of CONF, HOLD,
and other similar softkeys or buttons to avoid accidentally putting the
current call on hold. The phone also disables hook flash event
handling.
Only the far end can terminate an emergency call.
The phone is restored to normal after the call is terminated and the
SPA9x2 is back on-hook.
Maximum number length is 63 characters.
Defaults to blank (no emergency number).
Parameter Description